US5014787A - Single well injection and production system - Google Patents
Single well injection and production system Download PDFInfo
- Publication number
- US5014787A US5014787A US07/394,687 US39468789A US5014787A US 5014787 A US5014787 A US 5014787A US 39468789 A US39468789 A US 39468789A US 5014787 A US5014787 A US 5014787A
- Authority
- US
- United States
- Prior art keywords
- tubing string
- formation
- string
- fluid
- packer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000002347 injection Methods 0.000 title claims abstract description 23
- 239000007924 injection Substances 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000004891 communication Methods 0.000 claims abstract description 15
- 230000015572 biosynthetic process Effects 0.000 claims description 38
- 238000011084 recovery Methods 0.000 claims description 8
- 229930195733 hydrocarbon Natural products 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000005755 formation reaction Methods 0.000 description 32
- 239000000295 fuel oil Substances 0.000 description 10
- 239000003208 petroleum Substances 0.000 description 9
- 230000004888 barrier function Effects 0.000 description 4
- 239000003921 oil Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000001976 improved effect Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000004936 stimulating effect Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000010795 Steam Flooding Methods 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000001483 mobilizing effect Effects 0.000 description 1
- 235000012771 pancakes Nutrition 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- 239000011275 tar sand Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
Definitions
- This invention relates generally to the production of containing formations.
- Deposits of highly viscous crude petroleum represent a major future resource in the United States in Ca. and Ut., where estimated remaining inplace reserves of viscous or heavy oil are approximately 200 million barrels. Overwhelmingly, the largest deposits in the world are located in Alberta province Canada, where the in-place reserves approach 1,000 billion barrels from depths of about 2,000 feet to surface outcroppings and at viscosities of up to 1 million c.p. at reservoir temperature.
- the only method of commercially recovering such reserves was through surface mining at the outcrop locations. It has been estimated that more than 90% of the total reserves are not recoverable through surface mining operations.
- U.S Pat. No. 4,037,658 to Anderson teaches a method of assisting the recovery of viscous petroleum such as from tar sands by utilizing a controlled flow of hot fluid in a flow path within the formation but out of direct contact with the viscous petroleum; thus a solid-wall, hollow tubular member in the formation is used for conducting hot fluid to reduce the viscosity of the petroleum to develop a potential passage in the formation outside the tubular member into which a fluid is injected to promote movement of the petroleum to a production position.
- HASDrive Heated Annulus Steam Drive
- a hole is formed through the petroleum-containing formation and a solid wall hollow tubular member is inserted into the hole to provide a continuous, uninterrupted flow path through the formation.
- a hot fluid is flowed through the interior of the tubular member out of contact with the formation to heat viscous petroleum in the formation outside the tubular member to reduce the viscosity of at least a portion of the petroleum adjacent the outside of the tubular member thereby providing a potential passage for fluid flow through the formation adjacent to the outsIde ot lhe lubuIar member.
- a drive fluid is then injected into the formation to promote movement of the petroleum for recovery from the formation.
- U.S. Pat. No. 4,565,245 to Mims describes a well completion for a generally horizontal well in a heavy oil or tar sand formation.
- the apparatus disclosed by Mims includes a well liner, a single string of tubing, and an inflatable packer which forms an impervious barrier and is located in the annulus between the single string of tubing and the well liner.
- a thermal drive fluid is injected down the annulus and into the formation near the packer.
- Produced fluids enter the well liner behind the inflatable packer and are conducted up the single string of tubing to the wellhead.
- the method contemplated by the Mims patent requires the hot stimulating fluid be flowed into the well annular zone formed between the single string of tubing and the wellhead.
- the method contemplated by the Mims patent requires the hot stimulating fluid be flowed into the well annular zone formed between the single string of tubing and the casing.
- thermal fluid where the thermal fluid is steam
- the scale is a deposition of solids such as sodium carbonate and sodium chloride, normally carried in the liquid phase of the steam as dissolved solids, and are deposited as a result of heat exchange between the fluid in the tubing and the fluid in the annulus.
- the well bore be substantially horizontal relative to the surface, but may be at any orientation within the formation.
- the improved heavy oil production method disclosed herein is thus effective in establishing communication between the injection zone and production zone through the ability of the well bore casing to conduct heat from the interior of the well bore to the heavy oil in the formation near the well bore. At least a portion of the heavy oil in the formation near the well bore casing would be heated, its viscosity lowered and thus have a greater tendency to flow.
- the single well method and apparatus of the present invention in operation therefore accomplishes the substantial purpose of an injection well, a production well, and a means of establishing communication therebetween.
- a heavy oil reservoir may therefore be more effectively produced by employing the method and apparatus of the present invention in a plurality of wells, each well bore having therein a means for continuous thermal drive fluid injection simultaneous with continuous produced fluid production and multiple tubing strings.
- the present invention therefore forms, a comprehensive system for recovery of highly viscous crude oil when practiced along with conventional equipment of the type well known in the generation of thermal injection fluide for the recovery of heavy oil.
- FIG. 1 is an elevation view in cross section of the single well injector and producer contemplated.
- a subterranean earth formation 10 is penetrated by a wellbore having a casing 12.
- Upper perforations 20 and lower perforations 22 provide fluid communication from the wellbore interior to the earth formation 10.
- a top packer 26 and bottom packer 28 are placed above the perforations 20 and 22 respectively.
- a second tubing string 30 and first tubing string 32 are placed within the wellbore casing 12, both tubing strings extending through top packer 26.
- Second tubing string 30 terminates at a depth shallower in the wellbore than bottom packer 28.
- An annular-like injection fluid flow path 36 is created by the space bounded by the top packer packer 26, bottom packer 28, and within the well bore casing 12 exterior of either tubing string.
- First tubing string 32 further extends through bottom packer 28, terminating at a depth below bottom packer 28.
- second tubing string 30 is supplied with pressured injection fluid from an injection fluid supply source (not shown). Injection fluid flows down second tubing string 30, exhausting from the terminus of the tubing string into the annular-like injection fluid flow path 36. Continual supply of high pressure injection fluid to the second tubing string 30 forces the injection fluid upward the annular flow path 36, toward the relatively lower pressured earth formation 10, through upper perforations 20.
- the injection fluid is steam. When steam flows up the annular flow path 36 bounded by casing 12, thermal energy is conducted through the wellbore casing 12, and heating at least a portion of the earth formation 10 near the wellbore.
- Hydrocarbon containing fluid located within the earth formation 10 near the wellbore casing having now an elevated temperature and thus a lower viscosity over that naturally occurring in situ, will tend to flow along the heated flow path exterior of the casing 12.
- This heated flow path is formed near the wellbore casing 12 by heat conducted from steam flow in the annular-like flow path 36 on the interior of the casing 12, causing fluid to flow toward the relatively lower pressure region near lower perforations 22.
- produced fluids comprising hydrocarbons and water including condensed steam enters from the earth formation 10 through lower casing perforations 22 to the interior of the wellbore casing 12 below bottom packer 28.
- Produced fluids are continously flowed into second tubing string 32 and up the tubing string to surface facilities (not shown) for separation and further processing.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
Description
Claims (7)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/394,687 US5014787A (en) | 1989-08-16 | 1989-08-16 | Single well injection and production system |
CA000615370A CA1327744C (en) | 1989-08-16 | 1989-09-29 | Single well injection and production system |
US07/633,582 US5131471A (en) | 1989-08-16 | 1990-12-21 | Single well injection and production system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/394,687 US5014787A (en) | 1989-08-16 | 1989-08-16 | Single well injection and production system |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/633,582 Continuation-In-Part US5131471A (en) | 1989-08-16 | 1990-12-21 | Single well injection and production system |
Publications (1)
Publication Number | Publication Date |
---|---|
US5014787A true US5014787A (en) | 1991-05-14 |
Family
ID=23560009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/394,687 Expired - Fee Related US5014787A (en) | 1989-08-16 | 1989-08-16 | Single well injection and production system |
Country Status (2)
Country | Link |
---|---|
US (1) | US5014787A (en) |
CA (1) | CA1327744C (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5131471A (en) * | 1989-08-16 | 1992-07-21 | Chevron Research And Technology Company | Single well injection and production system |
US5339904A (en) * | 1992-12-10 | 1994-08-23 | Mobil Oil Corporation | Oil recovery optimization using a well having both horizontal and vertical sections |
US5579838A (en) * | 1995-08-07 | 1996-12-03 | Enviro-Tech Tools, Inc. | Above production disposal tool |
US6070663A (en) * | 1997-06-16 | 2000-06-06 | Shell Oil Company | Multi-zone profile control |
US6776234B2 (en) | 2001-12-21 | 2004-08-17 | Edward L. Boudreau | Recovery composition and method |
US20080023197A1 (en) * | 2006-07-25 | 2008-01-31 | Shurtleff J K | Apparatus, system, and method for in-situ extraction of hydrocarbons |
US20100126720A1 (en) * | 2007-01-29 | 2010-05-27 | Noetic Technologies Inc. | Method for providing a preferential specific injection distribution from a horizontal injection well |
US7770643B2 (en) | 2006-10-10 | 2010-08-10 | Halliburton Energy Services, Inc. | Hydrocarbon recovery using fluids |
US7809538B2 (en) | 2006-01-13 | 2010-10-05 | Halliburton Energy Services, Inc. | Real time monitoring and control of thermal recovery operations for heavy oil reservoirs |
US7832482B2 (en) | 2006-10-10 | 2010-11-16 | Halliburton Energy Services, Inc. | Producing resources using steam injection |
US20110067876A1 (en) * | 2009-09-24 | 2011-03-24 | Dewayne Turner | Method and apparatus for injecting fluid in a wellbore |
US20160032692A1 (en) * | 2014-07-30 | 2016-02-04 | Shell Oil Company | Induced control excitation for enhanced reservoir flow characterization |
US10458215B2 (en) | 2013-03-13 | 2019-10-29 | Exxonmobil Upstream Research Company | Producing hydrocarbons from a formation |
US10487636B2 (en) | 2017-07-27 | 2019-11-26 | Exxonmobil Upstream Research Company | Enhanced methods for recovering viscous hydrocarbons from a subterranean formation as a follow-up to thermal recovery processes |
US10890057B2 (en) | 2015-07-28 | 2021-01-12 | NCS Multistage, LLC | Method for injecting fluid into a formation to produce oil |
US11002123B2 (en) | 2017-08-31 | 2021-05-11 | Exxonmobil Upstream Research Company | Thermal recovery methods for recovering viscous hydrocarbons from a subterranean formation |
US11142681B2 (en) | 2017-06-29 | 2021-10-12 | Exxonmobil Upstream Research Company | Chasing solvent for enhanced recovery processes |
US11261725B2 (en) | 2017-10-24 | 2022-03-01 | Exxonmobil Upstream Research Company | Systems and methods for estimating and controlling liquid level using periodic shut-ins |
US11634977B2 (en) | 2013-02-12 | 2023-04-25 | NCS Multistage, LLC | Well injection and production method and system |
Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
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US3116792A (en) * | 1959-07-27 | 1964-01-07 | Phillips Petroleum Co | In situ combustion process |
US3126961A (en) * | 1964-03-31 | Recovery of tars and heavy oils by gas extraction | ||
US3159215A (en) * | 1958-09-23 | 1964-12-01 | California Research Corp | Assisted petroleum recovery by selective combustion in multi-bedded reservoirs |
US3180413A (en) * | 1962-12-31 | 1965-04-27 | Jersey Prod Res Co | Cross flow thermal oil recovery process |
US3182722A (en) * | 1961-12-19 | 1965-05-11 | Gulf Research Development Co | Process for completing wells in unconsolidated formations by reverse in situ combustion |
US3273640A (en) * | 1963-12-13 | 1966-09-20 | Pyrochem Corp | Pressure pulsing perpendicular permeability process for winning stabilized primary volatiles from oil shale in situ |
US3349846A (en) * | 1964-07-30 | 1967-10-31 | Phillips Petroleum Co | Production of heavy crude oil by heating |
US3358756A (en) * | 1965-03-12 | 1967-12-19 | Shell Oil Co | Method for in situ recovery of solid or semi-solid petroleum deposits |
US3361202A (en) * | 1965-08-05 | 1968-01-02 | Phillips Petroleum Co | Process and apparatus for producing crude oil from separate strata |
US3379247A (en) * | 1965-11-08 | 1968-04-23 | Phillips Petroleum Co | Oil recovery process using hot fluids |
US3386508A (en) * | 1966-02-21 | 1968-06-04 | Exxon Production Research Co | Process and system for the recovery of viscous oil |
US3599714A (en) * | 1969-09-08 | 1971-08-17 | Roger L Messman | Method of recovering hydrocarbons by in situ combustion |
US3994341A (en) * | 1975-10-30 | 1976-11-30 | Chevron Research Company | Recovering viscous petroleum from thick tar sand |
US4362213A (en) * | 1978-12-29 | 1982-12-07 | Hydrocarbon Research, Inc. | Method of in situ oil extraction using hot solvent vapor injection |
US4488598A (en) * | 1983-03-18 | 1984-12-18 | Chevron Research Company | Steam, noncondensable gas and foam for steam and distillation drive _in subsurface petroleum production |
US4595057A (en) * | 1984-05-18 | 1986-06-17 | Chevron Research Company | Parallel string method for multiple string, thermal fluid injection |
US4601338A (en) * | 1985-02-04 | 1986-07-22 | Shell Oil Company | Foam and impedance-guided steam injection |
US4753293A (en) * | 1982-01-18 | 1988-06-28 | Trw Inc. | Process for recovering petroleum from formations containing viscous crude or tar |
-
1989
- 1989-08-16 US US07/394,687 patent/US5014787A/en not_active Expired - Fee Related
- 1989-09-29 CA CA000615370A patent/CA1327744C/en not_active Expired - Fee Related
Patent Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3126961A (en) * | 1964-03-31 | Recovery of tars and heavy oils by gas extraction | ||
US3159215A (en) * | 1958-09-23 | 1964-12-01 | California Research Corp | Assisted petroleum recovery by selective combustion in multi-bedded reservoirs |
US3116792A (en) * | 1959-07-27 | 1964-01-07 | Phillips Petroleum Co | In situ combustion process |
US3182722A (en) * | 1961-12-19 | 1965-05-11 | Gulf Research Development Co | Process for completing wells in unconsolidated formations by reverse in situ combustion |
US3180413A (en) * | 1962-12-31 | 1965-04-27 | Jersey Prod Res Co | Cross flow thermal oil recovery process |
US3273640A (en) * | 1963-12-13 | 1966-09-20 | Pyrochem Corp | Pressure pulsing perpendicular permeability process for winning stabilized primary volatiles from oil shale in situ |
US3349846A (en) * | 1964-07-30 | 1967-10-31 | Phillips Petroleum Co | Production of heavy crude oil by heating |
US3358756A (en) * | 1965-03-12 | 1967-12-19 | Shell Oil Co | Method for in situ recovery of solid or semi-solid petroleum deposits |
US3361202A (en) * | 1965-08-05 | 1968-01-02 | Phillips Petroleum Co | Process and apparatus for producing crude oil from separate strata |
US3379247A (en) * | 1965-11-08 | 1968-04-23 | Phillips Petroleum Co | Oil recovery process using hot fluids |
US3386508A (en) * | 1966-02-21 | 1968-06-04 | Exxon Production Research Co | Process and system for the recovery of viscous oil |
US3599714A (en) * | 1969-09-08 | 1971-08-17 | Roger L Messman | Method of recovering hydrocarbons by in situ combustion |
US3994341A (en) * | 1975-10-30 | 1976-11-30 | Chevron Research Company | Recovering viscous petroleum from thick tar sand |
US4362213A (en) * | 1978-12-29 | 1982-12-07 | Hydrocarbon Research, Inc. | Method of in situ oil extraction using hot solvent vapor injection |
US4753293A (en) * | 1982-01-18 | 1988-06-28 | Trw Inc. | Process for recovering petroleum from formations containing viscous crude or tar |
US4488598A (en) * | 1983-03-18 | 1984-12-18 | Chevron Research Company | Steam, noncondensable gas and foam for steam and distillation drive _in subsurface petroleum production |
US4595057A (en) * | 1984-05-18 | 1986-06-17 | Chevron Research Company | Parallel string method for multiple string, thermal fluid injection |
US4601338A (en) * | 1985-02-04 | 1986-07-22 | Shell Oil Company | Foam and impedance-guided steam injection |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5131471A (en) * | 1989-08-16 | 1992-07-21 | Chevron Research And Technology Company | Single well injection and production system |
US5339904A (en) * | 1992-12-10 | 1994-08-23 | Mobil Oil Corporation | Oil recovery optimization using a well having both horizontal and vertical sections |
US5579838A (en) * | 1995-08-07 | 1996-12-03 | Enviro-Tech Tools, Inc. | Above production disposal tool |
US6070663A (en) * | 1997-06-16 | 2000-06-06 | Shell Oil Company | Multi-zone profile control |
US6776234B2 (en) | 2001-12-21 | 2004-08-17 | Edward L. Boudreau | Recovery composition and method |
US7312184B2 (en) | 2001-12-21 | 2007-12-25 | Boudreau Edward L | Recovery composition and method |
US20080113881A1 (en) * | 2001-12-21 | 2008-05-15 | Edward L. Boudreau | Recovery composition and method |
US7809538B2 (en) | 2006-01-13 | 2010-10-05 | Halliburton Energy Services, Inc. | Real time monitoring and control of thermal recovery operations for heavy oil reservoirs |
US20080023197A1 (en) * | 2006-07-25 | 2008-01-31 | Shurtleff J K | Apparatus, system, and method for in-situ extraction of hydrocarbons |
US8205674B2 (en) * | 2006-07-25 | 2012-06-26 | Mountain West Energy Inc. | Apparatus, system, and method for in-situ extraction of hydrocarbons |
US7770643B2 (en) | 2006-10-10 | 2010-08-10 | Halliburton Energy Services, Inc. | Hydrocarbon recovery using fluids |
US7832482B2 (en) | 2006-10-10 | 2010-11-16 | Halliburton Energy Services, Inc. | Producing resources using steam injection |
US20100126720A1 (en) * | 2007-01-29 | 2010-05-27 | Noetic Technologies Inc. | Method for providing a preferential specific injection distribution from a horizontal injection well |
US8196661B2 (en) | 2007-01-29 | 2012-06-12 | Noetic Technologies Inc. | Method for providing a preferential specific injection distribution from a horizontal injection well |
US20110067876A1 (en) * | 2009-09-24 | 2011-03-24 | Dewayne Turner | Method and apparatus for injecting fluid in a wellbore |
US8157017B2 (en) | 2009-09-24 | 2012-04-17 | Baker Hughes Incorporated | Method and apparatus for injecting fluid in a wellbore |
US11634977B2 (en) | 2013-02-12 | 2023-04-25 | NCS Multistage, LLC | Well injection and production method and system |
US10458215B2 (en) | 2013-03-13 | 2019-10-29 | Exxonmobil Upstream Research Company | Producing hydrocarbons from a formation |
US20160032692A1 (en) * | 2014-07-30 | 2016-02-04 | Shell Oil Company | Induced control excitation for enhanced reservoir flow characterization |
US10233727B2 (en) * | 2014-07-30 | 2019-03-19 | International Business Machines Corporation | Induced control excitation for enhanced reservoir flow characterization |
US10890057B2 (en) | 2015-07-28 | 2021-01-12 | NCS Multistage, LLC | Method for injecting fluid into a formation to produce oil |
US11377940B2 (en) | 2015-07-28 | 2022-07-05 | Devon Energy Production Company, L.P. | Method for injecting fluid into a formation to produce oil |
US11142681B2 (en) | 2017-06-29 | 2021-10-12 | Exxonmobil Upstream Research Company | Chasing solvent for enhanced recovery processes |
US10487636B2 (en) | 2017-07-27 | 2019-11-26 | Exxonmobil Upstream Research Company | Enhanced methods for recovering viscous hydrocarbons from a subterranean formation as a follow-up to thermal recovery processes |
US11002123B2 (en) | 2017-08-31 | 2021-05-11 | Exxonmobil Upstream Research Company | Thermal recovery methods for recovering viscous hydrocarbons from a subterranean formation |
US11261725B2 (en) | 2017-10-24 | 2022-03-01 | Exxonmobil Upstream Research Company | Systems and methods for estimating and controlling liquid level using periodic shut-ins |
Also Published As
Publication number | Publication date |
---|---|
CA1327744C (en) | 1994-03-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CHEVRON RESEARCH COMPANY, SAN FRANCISCO, CA. A COR Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DUERKSEN, JOHN H.;REEL/FRAME:005111/0798 Effective date: 19890815 |
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AS | Assignment |
Owner name: CHEVRON RESEARCH AND TECHNOLOGY Free format text: CHANGE OF NAME;ASSIGNOR:CHEVRON RESEARCH COMPANY;REEL/FRAME:005953/0086 Effective date: 19910906 |
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FPAY | Fee payment |
Year of fee payment: 4 |
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REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19990514 |
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STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |